Auto-Sleepers Symbol Plus 2018, Manual

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CONNECTION OF SERVICES
3 System Technical Information
The following section provides further technical information relating to the electrical system. You
can also access the supporting technical manual from www.sargentltd.co.uk.
3.1 Residual Current Device & Miniature Circuit Breakers
The Residual Current Device (RCD) is
basically provided to protect the user from
lethal electric shock. The RCD will turn off (trip)
if the current flowing in the live conductor does
not fully return down the neutral conductor, i.e.
some current is passing through a person
down to earth or through a faulty appliance.
To ensure the RCD is working correctly, the
test button should be operated each time the
vehicle is connected to the mains supply (see
section 2.3)
The Miniature Circuit Breakers (MCB’s)
operate in a similar way to traditional fuses and
are provided to protect the wiring installation
from overload or short circuit. If an overload
occurs the MCB will switch off the supply. If this occurs you should investigate the cause of the
fault before switching the MCB back on.
The following table shows the rating and circuit allocation for the three MCB’s
MCB Rating Description
1 10 Amps 230V Sockets
2 16 Amps Extra 230V Sockets / Heating System
3 10 Amps Fridge / 12V Charger / Aircon
3.2 Generator Usage
CAUTION should be used before connecting a generator to your motorhome.
WARNING: Never start or stop the generator while electrical loads are connected and
switched on. Start the engine, let it stabilise and then connect the electrical load. When
stopping the generator, disconnect the electrical load and let the engine stabilise before
switching off.
Whilst some generators use electronic inverter technology, others use a more basic principle to
generate the 230V supply. Preference should be to choose a generator which produces a
consistent sinusoidal wave form with accurate voltage control.
The Reverse Polarity warning light on the PSU may illuminate when using a Generator. This is a
normal side effect when using some types of generator. Instead of connecting the neutral
conductor to earth, some generators centre tap the earth connection making both neutral and
live conductors 110V above earth. This 110V difference causes the neon polarity indicator to
illuminate.
In most cases it is safe to use a generator, but please consult the generator handbook for further
information.